Discover command not working in python unittest

When working with Python unittest, it is not uncommon to encounter issues with the discover command not working as expected. This can be frustrating, especially when trying to run multiple test cases or test suites. However, there are several ways to solve this problem and ensure that the discover command functions properly.

Solution 1: Specify the directory explicitly

One way to solve the issue is by explicitly specifying the directory where the test cases are located. By doing so, you can ensure that the discover command searches for tests in the correct location.

import unittest

if __name__ == '__main__':
    test_dir = 'path/to/test/directory'
    discover =
    runner = unittest.TextTestRunner()

In the above code, replace ‘path/to/test/directory’ with the actual path to the directory containing your test cases. By explicitly specifying the directory, you eliminate any ambiguity and ensure that the discover command works as intended.

Solution 2: Use a pattern to match test files

Another way to solve the problem is by using a pattern to match the test files. This can be useful when you have multiple test files scattered across different directories.

import unittest

if __name__ == '__main__':
    test_pattern = 'test_*.py'
    discover =
    runner = unittest.TextTestRunner()

In the above code, replace ‘test_*.py’ with the pattern that matches your test files. For example, if all your test files start with ‘test_’ and have the ‘.py’ extension, you can use ‘test_*.py’ as the pattern. This way, the discover command will search for files that match the pattern and include them in the test suite.

Solution 3: Use the command line interface

If the above solutions do not work, you can try using the command line interface to run the tests. This can be done by executing the following command in your terminal:

python -m unittest discover

This command will automatically discover and run all the tests in the current directory and its subdirectories. It is a convenient way to ensure that the discover command works as expected without having to modify your code.

After considering the different solutions, it is difficult to determine which option is better as it depends on the specific requirements of your project. However, Solution 1 and Solution 2 provide more flexibility and control over the test discovery process, making them preferable in most cases. Solution 3 is a quick and easy option but may not be suitable for complex test setups.

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12 Responses

    1. Nah, Im sticking with Solution 2. GUI all the way! No need to waste time on command line mumbo jumbo. #UserFriendly #ClickAndTest

    1. I respectfully disagree. Command line interfaces are tried and true, offering unparalleled control and efficiency. They may not be as user-friendly as GUIs, but they are certainly trustworthy. Lets not dismiss them based on misconceptions.

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